Cassandra Miller is very active in London, where she works, and is one of those composers who has a sort of local cult. Most of her music is available on Another Timbre, but I just found an extraordinary piece for string orchestra, descending glissandi, relentlessly descending glissandi, on this interesting CD on bandcamp and spotify

She enjoys writing music which is based on found music, which he meticulously transcribes, her scores are micro-detailed and very technically demanding I'm told.
Probably my favourite pieces by her have been O Zomer and Philip The Wonderer (for Philip Thomas) -- here he is
https://www.youtube.com/v/FYiiilacMIs&ab_channel=continuummusicVery often her work is based on found music. In the Tracery series a piece of found music is used initially as the basis of a meditation, where a singer spontaneously responds to what she hears -- she has a singer working with her, Juliet Fraser. These improvisations are recorded and then processed. Here's Tracery: Rocking and Swaying, which is based on a Ben Johnson quartet, introduced by Juliet
https://vimeo.com/267404968In the introduction Juliet Fraser explains the evident connection to Pauline Oliveros's work. I note that, as far as I know, Oliveros's meditations were NOT performance pieces, and inded Fraser denies that what she's doing in Tracery is performing. I don't know what I think of this.